Recent evidence suggests that deep-sea waters (approximately 5000 meters below the surface) are rich in Thaumarchaeons
A. true
B. false
A
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Compare the flow of energy and the flow of nutrients in ecosystems.
A. Both function in the same way, as both energy and nutrients get recycled in ecosystems. B. Both function in the same way, as both energy and nutrients come in and out of ecosystems. C. Energy is recycled within ecosystems, while nutrients come in and out of ecosystems. D. Energy comes in and out of ecosystems, while nutrients are recycled within ecosystems.
Which of the following is probably the genetic basis for new and complex structures in plants?
a. gene duplication d. extinction b. asexual reproduction e. gene splicing c. genes that code for flower development
Which process can create new alleles?
A. natural selection B. mutation C. sexual reproduction D. genetic drift
A more or less circular ring of mushrooms appears in your yard, apparently overnight. The circle is several yards in diameter. The most likely explanation for this circle of mushrooms is that:
A) the mushrooms are all part of the same organism, with mycelia radiating out from the location of a germinated spore. B) a circle is nature's most perfect shape for asexual reproduction structures. C) the fungus produces a toxin in the center to prevent too many mushrooms from being produced. D) one mushroom in the circle reproduced sexually to make all the other mushrooms in the circle.